Some names ending in -er sound feminine, like Amber, Piper, and Winter. This isn't one of them. It sounds masculine to me. On the other hand, it doesn't sound like a name to begin with, and it just seems weird as one.

This feels more like a masculine name to me and I usually treat it as such. Also, I'm pretty sure when I looked it up on a different name site, it was listed as masculine. No matter, I absolutely love this name, whatever gender it is.

A coriander seed used to be used to start the dipping process in making a jawbreaker candy and the leafy parts (cilantro) are used in making salsa, I figure that the meaning for the name Coriander should be "sugar and spice and everything nice."

Coriander is the anglicized form of the Latin name for the spice, namely coriandrum. In turn, the Latin name comes from the Greek name for the spice, namely κορίανδρον (koriandron). The latter is a variant form of κορίαννον (koriannon), which is the name most commonly used (for the spice) in the Hellenic world. Another variant form is κορίανδρος (koriandros), which is the least common out of all of them.